Cabbage or headed cabbage is a leafy green or purple biennial plant, grown as an annual vegetable crop for its dense-leaved heads. Smooth-leafed firm-headed green cabbages are the most common, with smooth-leafed red and crinkle-leafed savoy cabbages of both colors seen more rarely. It is a multi-layered vegetable. Under conditions of long sunlit days such as are found at high northern latitudes in summer, cabbages can grow much larger.
